Fix Folia scheduler tasks not canceling when plugin disable (#10091)

patches/server/Folia-scheduler-and-owned-region-API.patch

@@ -16,6 +16,33 @@ by the regionaliser, as it is not guaranteed that anything
 outside of the buffer zone is owned. Then, the plugins may use
 the schedulers depending on the result of the ownership check.
 
+diff --git a/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java b/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java
++++ b/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java
+@@ -0,0 +0,0 @@ class PaperPluginInstanceManager {
+                 + pluginName + " (Is it up to date?)", ex, plugin); // Paper
+         }
+ 
++        // Paper start - Folia schedulers
++        try {
++            this.server.getGlobalRegionScheduler().cancelTasks(plugin);
++        } catch (Throwable ex) {
++            this.handlePluginException("Error occurred (in the plugin loader) while cancelling global tasks for "
++                + pluginName + " (Is it up to date?)", ex, plugin); // Paper
++        }
++
++        try {
++            this.server.getAsyncScheduler().cancelTasks(plugin);
++        } catch (Throwable ex) {
++            this.handlePluginException("Error occurred (in the plugin loader) while cancelling async tasks for "
++                + pluginName + " (Is it up to date?)", ex, plugin); // Paper
++        }
++        // Paper end - Folia schedulers
++
+         try {
+             this.server.getServicesManager().unregisterAll(plugin);
+         } catch (Throwable ex) {
 diff --git a/src/main/java/io/papermc/paper/threadedregions/EntityScheduler.java b/src/main/java/io/papermc/paper/threadedregions/EntityScheduler.java
 new file mode 100644
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000